Semi-automatic wood-lathe.



M. FANGET.

SEMI-AUTOMATIC WOOD LATHE.

APPLICATION FILED OCT. 24. 19M. 1,1 91mm. Patented July 11, 1916.

A 5 SHEETS-SHEET I.

IVI. FANGET.

SEMI-AUTOMATIC WOOD LATHE.

' APPLICATION FILED OCT. 24. 1914. llgflfififi. Patented July 11, 1916.

5 SHEETS-SHEET 2.

M. FANGET.

SEMI-AUTOMATIC WOOD LATHE.

APPUCATION FILED OCT. 24, 1914.

Patented. July 11, 1916.

5 SHEETS-SHEET 3.

IVI. FANGET.

SEMI-AUTOMATIC WOOD LATHE.

APPLICATION FILED 001.24. 1914.

Patented July 11, 1916.

5 SHEETS-SHEET 4.

R5 cm. PMnm-urnm. WASMINGTUN. p.11.

M. FANGET.

SEMI-AUTOMATIC WOOD LATHE.

APPLICATION FILED OCT-24. I914.

Patented July 11, 1 5 SHEETS'SHEET 5- Wig, 1U

VMV 75 MICHEL ren er, or LYON, Fanncn.

SEMI-AUTOMATIC \VOOD-IiATI-IE.

Specification of Letters Patent.

Patented July 11, 1916.

Application filed October 24, 1914. Serial No. 868,519.

Q'h (all whom it may concern Be it known that I MICHEL FANcn'r, a citizen of the French Republic, residing at (31 Rue de. Bonnell, Lyon, in the Republic of France, have invented certain new and useful Improvements in Semi-Automatic food-Lathes, of which the following is a specification.

This invention is a semi-automatic wood lathe.

The accompanying drawings illustrate, by way of example, a constructional form of the machine embodying the invention.

Figure 1 is a front elevation of the complete machine, and Fig. 2 is a plan thereof. Fig. 3 is an elevation of the left hand side. Fig. 4 is an elevation of the right hand side; a part of this view being a vertical section on line AA of Fig. 1. Fig. 5 is a cross section on line B,B of Fig. 1. Fig.

6 is a rear elevation of the machine with apart of the frame in section. Fig. 7 is a vertical cross section on line CC of Fig.

spectively of the brake-pulley. 1

The machine illustrated comprises a frame 1 made in the form of a truncated rectangular pyramid, the upper part of which is formed by a semi-cylindrical hood 2 on either side of which bearings 3 are provided, split at 4 so as to be capable of holding a tool carrying shaft 5. The hood 2 is closed by a cover 6 hinged at 7 and also of semi-cylindrical shape, said cover resting on the upper edge of the hood 2. An opening or window 8 is formed half in the lower hood and half in the cover 6. Said window serves for the introduction of the wood to be worked into. the hood 2, that is to say, into the active range of the tools carried by the shaft 5 The lower edge 9 of said window 8 serves to break the chips, while a screen 16 stops splinters which might be thrown outwardly through the window 8. The lower part of the hood 2 is provided with a passage or conduit 10 inclined tangentially to the said hood. The conduit 10 serves for the discharge of chips or the like that may have been drawn up through a channel 11 c nne ted to the c nduit 10, The

frame 1 is provided on either side with a rim or bracket 12-, supporting a horizontal rail 13, serving tov guide the carriage 14 that carries a head-stock and a tail. Absolutely parallel guiding of said carriage is insured by two arms 15. of relatively great length, the. free ends of which engage the upper parts of the. corresponding rails13. The carriage 14 which extends from one rail to the opposite. rail, that is to say over the entire width of the machine, has a dovetailed groove 17 extending thrdughout its entire width in which the head-stock 18 and tailstock 19 are mounted,

The head-stock 18 provided with suitable bearings. 20., carries a spindle 21, operated by means of a pulley 22 and carrying a toothed pinion 23 meshing with a second pinion 24, mounted on a parallel shaft 25, one end of which carries, the work holding center 26. On said shaft a brake-pulley 27 is secured, encircled by a collar 28 se cured to the, head-stock and adapted to, be tightened by means of a screw 29 so as to avoid thev vibrations produced by the successive cuts of the tools. The tail-stock 19 which is j ournaled in bearings 30, connected by means of a sleeve 31, comprises a spindle 32 which carries the second center 38; said spindle is co-axial with the shaft 25 of the head-stock 18. The spindle 32 is adapted to slide longitudinally in its bearings, so as to permit of engaging and disengaging the work between the two centers. To this end, said spindle 32 has a rack 33, meshing with a toothed sector 34 which projects through an opening 3,5v in the sleeve 31, said sector being actuated by hand through the medium of a lever 3.6 keyed upon the axis 37 of the sector.

Secured to the spindle 3,2 is the end of an arm 39, carried by a rod 40 guided in both the head-stock 18 and the tail stock 19 and carrying a second arm 41 in proximity to the center 26, said arm 41 having a socket 42 fitting over the center 26. When said socket is pulled to the right together with the center carrying spindle 32 by means of the lever of the. sector 34, it will disengage the finished work from the center 26. The relative position of the head-stock 18 and tail stock 19 may be adjusted according to the length of the work by displacing the g i r 1,190,532

same in the groove 17 wherein they may be locked by means of a movable plate 43 engaging said groove and adapted to be secured in position by means of a bolt 44.

During operation the carriage 14 is alternately moved toward and away from the hood '2 so as to bring the work within the reach of the tools rotating in the said hood. This movement does not take place contin- 7 1o fuously; at the end of each travel the carriage is stopped for a greater or lesser period as desired by the operator, said stoppage being the result of a disengagement produced when the carriage 14 is in the farthermost position from the hood 2, enabling the operator to replace the finished work by a blank.

The mechanism serving to impart movement to the carriage and to stop the same is arranged as follows: On the right hand .side'of the frame 1. a bearing 45 is provided wherein a shaft 46 is .journaled carrying a stepped pulley 47. Said shaft 46 is. provided with a longitudinal key 48,

guiding a pinion 49 of a grooved sleeve50,

engaged by the forked end of 'a' lever 51 serving to throw the mechanismautomati- I cally out of gear. When the lever 51 is moved to throw the mechanism into gear.

. the pinion 49 will mesh with a toothed wheel 52 mounted on a shaft 53 arranged at the rear of the machine, transmitting 'movement to a grooved-cam 54. The groove of this cam which'is located on the left hand side of the frame 1, is engaged by a roller 55 carried byone end of a lever 56, the opposite end of which fits around a shaft 57, arranged transversely at the front of the frame 1 in bearings 58. On the shaft 57a lever 59 is keyed, the forked end 60 of which carries two strong screws 61, screwed into the arms of the fork 60 and resting on either side of the lever 56. The shaft 57 carries. also levers 56 and 59, arms 64 the upper mortised (62) ends of which engage the two pins 63 ofthe carriage 14. The oscillations of the lever 56 produced by the cam '54 and transmitted by'the screws 61, lever 59, shaft 57 and arms 64, impart reciprocating movements to the carriage 14.

The reciprocating travel of the carriage 14 which has a constant length determined by the groove of the cam 54, may be advanced or moved'back as desired, so as to bring thecarriage nearer to or farther away from the tool carrying shaft 5, whereby the diameterof the work may be decreased or increased respectively. This displacement of the travel of the carriage 14 is obtained by 69 loosening one of the screws 61 and tightening the other, so as to open or close to a greater or lesser extent the angle comprised between the lever 56 and the arms 64, there- 'by varying the distance between the end of the arm 64 (that is to say the carriage 14) and the hood 2 for the position of the lever 56 on the cam 54. The feed of the carriage 14 toward the shaft 5 is limited in an adjustable manner by a screw 64, extending through the carriage and engaging a projection 65 of the frame 1. The projection or stop has been provided in order to avoid accidents which may result from a loosening of the screw 61, and to prevent the work from being moved too far into the hood 2. The configuration of the groove in the cam 54 is such that it produces first a rapid and progressive feed of the work toward the tool carrying shaft, then a slow feed of the work into the tools whereupon 0 the work is stopped during which stoppage it is finished by the tools, the carriage being then quickly returned to the end of its travel and automatically thrown out of gear. 35

The clutch for throwing the carriage into and out of gear is constituted in the following manner: On the side turned toward the stepped pulley 47, the frame 1 is provided with two brackets 66 and 66, wherein the clutch sha ft 69 is ournaled, carrying the lever 51 keyed thereupon. The said shaft 69 carries also a. hand lever 67 and is controlled by a coil spring 68, hearing on the one hand on the bracket 66 and on the other hand on the shaft 69. The hand lever 67 is provided with a hook 70 which may be brought into engagement with a snap latch 71, guided in a bracket 72 secured to the front end of the right hand rail 13. The snap latch is formed with. a beveled or tapered portion 73. facilitating the introduction of the hook 70 into the said latch. The latter is moreover provided with a rod 74 also guided-in the bracket 72 and extending into the path of the carriage 14; a spring 75 surrounding the rod 74 holds the latter constantly in said position.

To put the machine in operation, the cover 6 of the hood 2 is lifted and the desired cutting blades are mounted on the tool-holders of the shaft 5. The thickness of the work to be turned is then determined by suitably adjusting the screws 61, which control the limits of the travel f the work carrying carriage, whereupon the machine may be started. For turning the work, a piece of wood is placed between the centers 26 and 38, which may be done by engaging the piece of wood first upon the center 26 1 and then pushing the center 38 toward the left by means of the lever 36 actuating the sector 34; it is assumed that the distance between the centers has been adjusted previously in accordance with the length of the pieces to be worked. The work being tightened between the centers, the pulley 22 of the head-stock 18 is actuated as well as the pulley 76 which operates the tool carrying shaft 5. These two pulleys may be rotated continuously together with the parts operated thereby.

For each piece of work to be turned the hand-lever 67 is pushed toward the snaplatch 71, so as to cause the latter to move backwardly under the pressure of the hook against its beveled portion 73. After the passage of the hook 70, the snap latch again locks the lever 67 in its engaging position, in which said lever holds the forked lever 51 in such a position that the pinion 49 meshes with the toothed wheel 52. Thereupon the cam 54 begins its rotary movement, whereby the shaft 57 is rocked and causes the arms 64 to push the carriage in a forward direction, first quickly until the Work rotating between the centers is brought through the opening 8 of the hood 2 into contact with the tools rotating within said hood. Once this contact is established, the feed of the work takes place more slowly until its extreme limit, where the relative positions of the work and of the tools are not varied for a few moments which are necessary for finishing the work. The de sired degree of finish being obtained, the cam 54 rapidly returns the carriage to the front. At the end of this movement the carriage engages with and pushes back the rod 74 of the snap latch 71, so that the latter releases the lever 67, which is then free to follow the action of the spring 68, rotating the shaft 69, so as to disengage the pinion 49 from the gear-wheel 52 through the medium of the forked lever 51, whereby the movement of the'carriage 14 is stopped at the front part of the rails 13, that is to say, at a point where the finished piece of work may be easily replaced by a new piece of wood. The operation is continued by replacing each finished piece of work by a new piece of work to be turned, and by throwing the pinion 49 into gear with the toothed wheel 52 by means of the lever 67 for each piece of work to be turned.

What I claim and desire to secure by Letters Patent of the United States is 1. A semi-automatic wood lathe comprising in combination a tool carrying shaft journaled in stationary brackets, means for rotating said shaft, a work carriage, and means for reciprocating said work carriage at right angles to said tool shaft in such manner that it is first given a quick forward movement to bring the work into contact with the tools, the remainder of its forward movement being at a relatively slow rate, then held stationary while the wood working is completed and finally returned to its initial position, substantially as described.

2. A semi-automatic wood lathe comprising in combination, a tool carrying shaft journaled in stationary brackets, means for rotating said shaft, a work carriage, means for reciprocating said work carriage at right angles to said shaft, automatic means for varying the rate of travel of said carriage at a predetermined point in its movement and for stopping said carriage while the tools operate upon the work, and means for automatically disconnecting the carriage from its driving mechanism upon its return to its initial position.

A semiautomatic wood lathe comprising in combination a tool carrying shaft journaled in stationary brackets, means for rotating said shaft, a work carriage, means for reciprocating said work carriage at right angles to said shaft, means for varying the length of travel of said carriage, automatic means for decreasing the rate of travel of said carriage when the work is in contact with the tools and for holding the carriage stationary for a predetermined period while said tools operate on the work, and means for automatically disconnecting the carriage from its driving mechanism upon its return to its initial position.

4. A semi-automatic wood lathe comprising in combination, a rotatable tool shaft, a movable work holding carriage, means for reciprocating said work carriage at right angles to said shaft, means for varying the length of travel of said carriage, automatic means for decreasing the rate of travel of said carriage at a predetermined point in the movement of said carriage and for holding the carriage stationary for a predetermined period while the tools operate on the work, a lever adapted'manually to be actuated to connect the carriage with its driving mechanism, and means for automatically disconnecting said carriage from its driving mechanism upon the completion of its backward stroke.

5. A semi-automatic wood lathe comprising a rotatable tool shaft, means for rotating said shaft, a work holding carriage, a grooved cam, means whereby said cam causes said carriage to move forward a predetermined distance quickly, then a predetermined distance slowly, to remain stationary for a predetermined period, and finally to return to its initial position, a lever adapted manually to be actuated to connect said cam with its driving mechanism, and means for automatically disconnecting said cam when the carriage has reached the limit of its backward travel.

6. A semi-automatic wood lathe comprising a rotatable tool shaft, means for rotating said shaft, a work holding carriage, a grooved cam, means whereby said cam causes said carriage to move forward a predetermined distance quickly, then a predetermined distance slowly, to remain station ary for a predetermined period, and finally to return to its initial position, a lever adapted manually to be actuated, to connect said am ith its d vi g mech m, means.

for holding said lever in engaging position In testimony whereof I afiix my signature during the carriage feeding and wood workin presence of witnesses.

ing operations, and means for automatically actuating said lever to disconnect said cam MICHEL FANGET' 5 from the driving mechanism when the car- Witnesses:

riage has reached the limit of its backward MARTHE MAGNOLON,

travel.

V PIERRE OSIRIS GUILLON.

' Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- 7' Washington, D. G. 

